Java认证模考试题（一）

Java 2 TEST
Given the following code:

class Test{

private int m;

public static void fun() {

// some code...

}

}

How can the member variable m be accessible directly in the method fun()?

B. change private int m to public int m

C. change private int m to static int m

D. change private int m to int m

Explanation: 

Correct Answer: C 1 of 60

 

　

 

Question: 2

public void example(){...}

B. public int example(){...}

C. public void example2(){...}

D. public int example ( int m, float f){...}

Explanation: 

Correct Answer: A,D 2 of 60

 

　

 

Question: 3

中国公务2004-5-27 22:14:08

public class Base{

int w, x, y ,z;

public Base(int a,int b){

x=a; y=b;

}

public Base(int a, int b, int c, int d){

// assignment x=a, y=b

w=d;

z=c;

}

}

Which expressions can be used at the point of // assignment x=a, y=b?

B. x=a, y=b;

C. x=a; y=b;

D. this(a,b);

Explanation: 

Correct Answer: C,D 3 of 60

 |||

　

 

Question: 4 

String s = story;

Which of the following expressions are legal?

B. char c = s[1];

C. int len = s.length;

D. String t = s.toLowerCase();

Explanation: 

Correct Answer: A,D 4 of 60

 

　

 

Question: 5
A. String

B. int

C. char

D. void

Explanation: 

Correct Answer: D 5 of 60